This processes the SET_MOVE_TABLE event. The table is moved
to the destination set.

declare
v_old_set_id int4;
v_origin int4;
begin
-- ----
-- Grab the central configuration lock
-- ----
lock table sl_config_lock;
-- ----
-- Get the tables current set
-- ----
select tab_set into v_old_set_id from sl_table
where tab_id = p_tab_id;
if not found then
raise exception 'Slony-I: table %d not found', p_tab_id;
end if;
-- ----
-- Check that both sets exist and originate here
-- ----
if p_new_set_id = v_old_set_id then
raise exception 'Slony-I: set ids cannot be identical';
end if;
select set_origin into v_origin from sl_set
where set_id = p_new_set_id;
if not found then
raise exception 'Slony-I: set % not found', p_new_set_id;
end if;
if v_origin != getLocalNodeId('_schemadoc') then
raise exception 'Slony-I: set % does not originate on local node',
p_new_set_id;
end if;
select set_origin into v_origin from sl_set
where set_id = v_old_set_id;
if not found then
raise exception 'Slony-I: set % not found', v_old_set_id;
end if;
if v_origin != getLocalNodeId('_schemadoc') then
raise exception 'Slony-I: set % does not originate on local node',
v_old_set_id;
end if;
-- ----
-- Check that both sets are subscribed by the same set of nodes
-- ----
if exists (select true from sl_subscribe SUB1
where SUB1.sub_set = p_new_set_id
and SUB1.sub_receiver not in (select SUB2.sub_receiver
from sl_subscribe SUB2
where SUB2.sub_set = v_old_set_id))
then
raise exception 'Slony-I: subscriber lists of set % and % are different',
p_new_set_id, v_old_set_id;
end if;
if exists (select true from sl_subscribe SUB1
where SUB1.sub_set = v_old_set_id
and SUB1.sub_receiver not in (select SUB2.sub_receiver
from sl_subscribe SUB2
where SUB2.sub_set = p_new_set_id))
then
raise exception 'Slony-I: subscriber lists of set % and % are different',
v_old_set_id, p_new_set_id;
end if;
-- ----
-- Change the set the table belongs to
-- ----
perform createEvent('_schemadoc', 'SYNC', NULL);
perform setMoveTable_int(p_tab_id, p_new_set_id);
return createEvent('_schemadoc', 'SET_MOVE_TABLE',
p_tab_id::text, p_new_set_id::text);
end;